화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.26, No.2, 173-181, February, 2018
DOI10.1007/s13233-018-6015-2  Export Citation
Proton Exchange Membrane with Enlarged Operating Temperature by Incorporating Phosphonic Acid Functionalized and Crosslinked Siloxane in Sulfonated Poly(ether ether ketone) (SPEEK) Matrix
Xuechao Ren, Chunhui Shen†, Shanjun Gao, Yuan Yuan, and Jiqin Chen
  • Department of Polymer Materials & Engineering, School of Material Science & Engineering, Wuhan University of Technology, No.122 Luoshi Road, Wuhan 430070, P. R. China
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A novel proton exchange membrane which can be applied in the range of 25-140°C is prepared by incorporating phosphonic acid functionalized crosslinked siloxane in sulfonated poly(ether ether ketone) matrix from amino trimethylene phosphonic acid (ATMP), epoxycyclohexylethyltrimethoxysilane (EHTMS), and sulfonated poly(ether ether ketone) (SPEEK). EHTMS is introduced to chemically fix free ATMP as well as a cross-linker. And, the obtained membranes are immersed in deionized water to remove free ATMP. Fourier transform infrared and X-ray diffraction patterns suggest that ATMP is anchored into EHTMS and Si-O-Si network forms successfully. These membranes are thermally stable up to 220 °C and exhibit excellent dimensional stability and mechanical performance. The addition of ATMP not only increases the amount of proton transfer sites, but also provides proton transport units for membranes at elevated temperature and low relative humidity (RH) condition. The proton conductivity of AES-4 membrane reaches 0.114S cm-1 at 80 °C and 100%RH and 0.056 Scm-1 at 140 °C and 20%RH, respectively.
Keywords:chemically bonded phosphonic acid;organic crosslinking network;proton transfer sites;proton conductivity
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